question_answer

A ball thrown vertically upwards with an initial velocity\[1.4\text{ }m{{s}^{-1}}\]returns in 2 s. The total displacement of the ball is

A)  22.4cm         

B)  zero

C)  44.8m           

D)  33.6m

Correct Answer: B

Solution :

 Displacement is defined as the distance between initial and final positions of the ball. In the given case, since ball returns back to its initial position, the displacement is zero. While distance is twice of path AB.